Self interface adjusting and controlling method of wear-resistant and self-lubricating Ti<3>Al<1-x>Si<x>C<2>-Mg matrix composite material

Abstract

The invention relates to a self interface adjusting and controlling method of a wear-resistant and self-lubricating Ti<3>Al<1-x>Si<x>C<2>-Mg matrix composite material. The weak interface bonding between Ti<3>SiC<2> and a Mg matrix can be avoided by replacing Ti<3>SiC<2> with Ti<3>(Si<x>Al<1-x>)C<2>. Ti<2>AlC can be replaced by Ti<3>(Si<x>Al<1-x>)C<2> to reduce the content of active Al at an A siteand increase the content of inert Si, so as to reduce the amount of formation of active materials at the interface of the composite material; and at the same time, since the elastic modulus and hardness of Ti<3>(Si<x>Al<1-x>)C<2> show a linear increase with the decrease of Al content [26], it can be predicted that the Ti<3>Al<1-x>Si<x>C<2>-Mg matrix composite material has self-lubricating properties, and meanwhile the wear-resistance can also be higher than that of a Ti<2>AlC-Mg matrix composite material and can be adjusted and controlled.

Description

Technical field [0001] The invention relates to a wear-resistant self-lubricating Ti 3 Al 1-x Si x C 2 -Mg-based composite material self-interface control method. Background technique [0002] Compared with Fe, Ti, Al and other metals, low-density magnesium (1.74g·cm -3 ) Has higher specific strength, specific stiffness, better damping, noise reduction, electromagnetic interference shielding performance, and good recyclability (Reference: Dey, A. and K.M. Pandey, Rev. Adv. Mater. Sci, 2015.42(1): p. 58-67). Global problems such as energy shortages and the greenhouse effect are stimulating the huge application potential of ultra-lightweight magnesium alloys in the automotive and aerospace fields. Among them, some medium and low temperature components require magnesium alloys with excellent strength, stiffness, impact resistance and wear resistance and self-lubricating properties (low wear rate and low friction coefficient), such as piston rings, bushings, bearings and other compo...

AI Technical Summary

Problems solved by technology

However, increasing Ti 2 AlC particle volume fraction to 10%, the wear resistance of the composites did not continue to improve

This is due to random 2 With the increase of the addition of AlC particles, the content of highly active nano-Mg grains and amorphous Mg layers at the interface of the composite material also increases, and the friction process is easily oxidized to form wear debris and cause material wear.

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